Cited by 62Memory and Neural MechanismsMemory Processes and InfluencesNeural dynamics and brain function

Contributions of primate prefrontal cortex and medial temporal lobe to temporal-order memory

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Naya, Yuji, Chen, He, Yang, Cen, Suzuki, Wendy A.·2017·Proceedings of the National Academy of Sciences

Abstract

Neuropsychological and neurophysiological studies have emphasized the role of the prefrontal cortex (PFC) in maintaining information about the temporal order of events or items for upcoming actions. However, the medial temporal lobe (MTL) has also been considered critical to bind individual events or items to their temporal context in episodic memory. Here we characterize the contributions of these brain areas by comparing single-unit activity in the dorsal and ventral regions of macaque lateral PFC (d-PFC and v-PFC) with activity in MTL areas including the hippocampus (HPC), entorhinal cortex, and perirhinal cortex (PRC) as well as in area TE during the encoding phase of a temporal-order memory task. The v-PFC cells signaled specific items at particular time periods of the task. By contrast, MTL cortical cells signaled specific items across multiple time periods and discriminated the items between time periods by modulating their firing rates. Analysis of the temporal dynamics of these signals showed that the conjunctive signal of item and temporal-order information in PRC developed earlier than that seen in v-PFC. During the delay interval between the two cue stimuli, while v-PFC provided prominent stimulus-selective delay activity, MTL areas did not. Both regions of PFC and HPC exhibited an incremental timing signal that appeared to represent the continuous passage of time during the encoding phase. However, the incremental timing signal in HPC was more prominent than that observed in PFC. These results suggest that PFC and MTL contribute to the encoding of the integration of item and timing information in distinct ways.

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Authors
Naya, Y., Chen, H., Yang, C., & Suzuki, W. A.
Affiliations
  • Peking University (CN)
  • New York University (US)
Venue
Proceedings of the National Academy of Sciences
Published
2017-11-30
Volume
114
Issue
51
Pages
13555-13560
ISSN
  • 0027-8424 (ISSN-L)
  • 1091-6490
OpenAlex
W2775146878
Cited by
62
References
51
Citations by year
2026: 5 · 2025: 4 · 2024: 2 · 2023: 6 · 2022: 7 · 2021: 10 · 2020: 17 · 2019: 8 · 2018: 3
FWCI
4.39
Type
journal article
Language
en
Open access
Locations
  • Proceedings of the National Academy of Sciences (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • HHS | NIH | National Institute of Mental Health (MH086563)
  • National Natural Science Foundation of China (31421003)
Topics
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Memory and Neural Mechanisms
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Memory Processes and Influences
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Neural dynamics and brain function
Keywords
temporal order memory, prefrontal cortex, medial temporal lobe, hippocampus, entorhinal cortex, perirhinal cortex, temporal coding, single-unit activity, macaque, delay activity, episodic memory
MeSH terms
Animals, Macaca mulatta, Male, Memory, Short-Term, Temporal Lobe, Prefrontal Cortex, Memory, Episodic

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